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Re: video.getContext

From: Kornel Lesiński <kornel@geekhood.net>
Date: Fri, 09 Mar 2012 12:47:35 -0000
To: public-html@w3.org
Message-ID: <op.wawltlyete2ec8@aimac.local>
On Fri, 09 Mar 2012 12:19:32 -0000, Sean Hayes <Sean.Hayes@microsoft.com>  

> Changing the subject line so this doesn't get drawn into the DRM  
> argument. I don’t have a dog in that fight.
> However I do think that video.getContext("..") might be a great hook for  
> supporting media accessibility features that require DSP like  
> computations to be injected into the pipeline, such as enhance/decrease  
> contrast, video magnifier, moving audio into frequency bands that the  
> user can hear, removing all but the center channel and so on.

If those are useful features implementable in most UAs, why not add them  
to the video itself?

Or maybe we don't need to change the <video>, and CSS/SVG filters can be  
used instead:


There's also audio API in the works:


I'm not familiar with Web Audio API, but on the surface it looks that it  
could be used with <video> and <audio> if HTMLMediaElement implemented  
AudioSourceNode interface. That would enable powerful filtering  
capabilities without other changes to video/audio elements.

regards, Kornel Lesiński
Received on Friday, 9 March 2012 12:48:05 UTC

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